David Foster Wallace on moving mountains

From Bill Katovsky’s “David Foster Wallace: A Profile” (McSweeney’s Internet Tendency: November 2008):

“I spent a lot of time as a volunteer in a nursing home in Amherst last summer. I was reading Dante’s Divine Comedy to an old man, Mr. Shulman. One day, I asked him where he was from. He said, ‘Just east of here, the Rockies.’ I said, ‘Mr. Shulman, the Rockies are west of here.’ He did a voilĂ  with his hands and then said, ‘I move mountains.’ That stuck with me. Fiction either moves mountains or it’s boring; it moves mountains or it sits on its ass.”